// Copyright 2018 The ksonnet authors
//
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

package log

import (
	"io"

	"github.com/sirupsen/logrus"
)

var (
	// VerbosityLevel is the current verbosity level.
	VerbosityLevel = 0
)

// Init initializes ksonnet's logger.
func Init(verbosity int, w io.Writer) {
	logrus.SetOutput(w)
	logrus.SetFormatter(defaultLogFmt())
	logrus.SetLevel(logLevel(verbosity))
	VerbosityLevel = verbosity

	logrus.WithField("verbosity-level", verbosity).Debug("setting log verbosity")
}

func defaultLogFmt() logrus.Formatter {
	return &logrus.TextFormatter{
		DisableTimestamp:       true,
		DisableLevelTruncation: true,
		QuoteEmptyFields:       true,
	}
}

func logLevel(verbosity int) logrus.Level {
	switch verbosity {
	case 0:
		return logrus.InfoLevel
	default:
		return logrus.DebugLevel
	}
}
